From mboxrd@z Thu Jan 1 00:00:00 1970 From: Carsten Otte Subject: [patch 06/12] [PATCH] kvm-s390-ucontrol: disable in-kernel irq stack Date: Wed, 14 Dec 2011 13:23:53 +0100 Message-ID: <20111214123126.586551936@de.ibm.com> References: <20111214122347.275452567@de.ibm.com> Cc: Christian Borntraeger , Heiko Carstens , Martin Schwidefsky , Cornelia Huck , KVM , Joachim von Buttlar , Jens Freimann , agraf@suse.de To: Avi Kivity , Marcelo Tossati Return-path: Received: from e06smtp12.uk.ibm.com ([195.75.94.108]:55760 "EHLO e06smtp12.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757058Ab1LNMbc (ORCPT ); Wed, 14 Dec 2011 07:31:32 -0500 Received: from /spool/local by e06smtp12.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 14 Dec 2011 12:31:31 -0000 Received: from d06av02.portsmouth.uk.ibm.com (d06av02.portsmouth.uk.ibm.com [9.149.37.228]) by d06nrmr1707.portsmouth.uk.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id pBECVRoo2367560 for ; Wed, 14 Dec 2011 12:31:28 GMT Received: from d06av02.portsmouth.uk.ibm.com (loopback [127.0.0.1]) by d06av02.portsmouth.uk.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id pBECVQll031764 for ; Wed, 14 Dec 2011 05:31:27 -0700 Content-Disposition: inline; filename=kvm-disable-irq-stack.patch Sender: kvm-owner@vger.kernel.org List-ID: This patch disables the in-kernel interrupt stack for KVM virtual machines that are controlled by user. Userspace has to take care of handling interrupts on its own. Signed-off-by: Carsten Otte --- --- arch/s390/kvm/kvm-s390.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -505,7 +505,8 @@ static int __vcpu_run(struct kvm_vcpu *v if (test_thread_flag(TIF_MCCK_PENDING)) s390_handle_mcck(); - kvm_s390_deliver_pending_interrupts(vcpu); + if (!kvm_is_ucontrol(vcpu->kvm)) + kvm_s390_deliver_pending_interrupts(vcpu); vcpu->arch.sie_block->icptcode = 0; local_irq_disable();